All multi-player characters
Quickly press Up, Down (x2), Right (x3), Left (x4) before the demonstration begins. Then hold C-Up and press Start at the “Press Start” menu. (A gunshot confirms correct entry.)
Alternately, complete the game at easy and normal difficulty settings.
C4 (multi-player mode)
Begin a multi-player game in the Factory-1 level. Any character can use C4 by pressing Down.
To beat Bandelus first quickly crouch-run and roll beneath the blue laser. This will be helpful later on. Then put you back to the wall you were facing when you first started the fight. Bandelus will run into the next room, but before you continue, shoot the farthest barrel until it blows up. This deactivates the blue laser in front of you. Then run to the steel crate, and while your running, count to three then roll. If you did it right Bandelus's shots will miss you. Next put your back to the wall near the crate. Pop out and shoot Bandelus, I recommend shotgun but you can use whatever you want. When his life is at 3/4 two guys will run from the room you started in. If you successfully rolled under the laser in the beginning the trap will go off and kill them both. If not, using your submachine gun, push A to get away from the wall but DON'T MOVE! If you do Bandelus will catch you in a cross fire. Take out the guys and return to the wall. When his life is at 1/3 he will rush at you. Him him with the machine gun and HIT HIM HARD! Drill at least a seven round burst into him. He will rush again and again so run to the first room and keep sniping him when he shows up. He will die soon after that.
Defeat Turret-Gun Boss
To beat the boss with the turrent gun start out against the pole where the movie ended. Back up from the boss (with pistol in hand) to the bottom right, out of his firing range. Blow up the boxes against the pole. Then get your back against the pole and swing out to the right or the outside. The next pole down there will be barrels. Blow them up and then run to that pole. Get in the same position when you shot the barrels and switch to another gun. After he is done firing swing out to the left or inside and shoot him a few times. Keep on repeating until he dies. He won't move toward you at all until the last few shots.
Defeat the Fire Boss
The easiest way to defeat the flamethrower boss is to run up and kneel right beside him. Then shot. The Boss will not be able to hurt you.
Defeat the Rocket Launcher Boss
Here is how to beat the boss with a rocket launcher. First you must switch to shotgun or machine gun. Second lock on to the boss using the C-down key. Next run back and forth across the room stopping suddenly and going the other way. Each time you stop fire a few rounds at the boss.
You use any gun and lock on to him with down c, then when he shoots rockets you roll underneath him and get back up and start shooting him. After while you end up killing him, by using roll technique.
In the beginning of the game when you get your first ammunition pack, do not kill the bad guy. If you hide behind the crate where the ammuntion pack is, he will put a medical kit on the table in the right corner of the room.
Greater lock-on range for pistol
If you need a farther lock on for your pistol, switch to your machine gun and then switch back to your pistol. You will then be locked on.
Reload pistol in Story mode
Press B when out of bullets in Story mode.
Sudden Death mode
Quickly press C-Left, C-Right, C-Left, C-Right, C-Up, C-Down, C-Up, C-Down before the demonstration begins. Then hold L and press Start at the “Press Start” menu. (A gunshot confirms correct entry.)
Alternately, complete the game at hard difficulty to unlock Max Power, Sudden Death and Trial modes.
Thunder shoots flame-thrower (multi-player mode)
Select the Boss character “Thunder”. Press R during game to activate laser sights. Then press B to fire the flame-thrower.
Quickly press Up, Down (x2), Right (x3), Left (x4) before the demonstration begins. Then hold C-Down and press Start at the “Press Start” menu. (A gunshot confirms correct entry.)